秦皇岛市草坪土壤肥力数值化综合评价与对策研究

Comprehensive digitization evaluation of turf soil fertility and management countermeasure research on turf soil in Qinhuangdao

以秦皇岛市草坪土壤为例,对土壤的理化性质进行了室内分析,并根据各肥力因子的植物效应建立了相应的隶属度函数,计算出各评价指标的隶属度值;利用主成分分析法,确定各评价指标的权重,通过模糊数学法对土壤肥力进行了综合评价。结果表明,秦皇岛市草坪土壤综合肥力水平较低,主要限制因子为容重、有机质、碱解氮、速效钾。评价结果与草坪草生长状况相一致,表明该评价方法能准确、客观地评价草坪土壤的肥力水平,具有一定的应用价值。针对评价结果得出的土壤肥力限制因子,提出了提高土壤肥力的管理措施,对秦皇岛市草坪土壤的维护和治理提供了重要的指导和参考依据。

Analysis of soil physical and chemical properties was made on turf soil in Oinghuangdao city. The corresponding membership function was built according to the plant effect of each fertilizer factor. The membership value of each evaluation index was calculated. The weight of each fertility factor was determined by the principal component analysis. Through fuzzy mathematics assessment, soil fertility quality was comprehensively evaluated. The result showed that the turf soil synthesis level was low, the main limiting factors were the bulk density, organic matter, alkali-hydrolysable nitrogen, and available potassium. The result was consistent with the growth status of the turf grass, which could reflect the fer- tilizer quality of the turf soil correctly and objectively. It showed that the evaluation method had some application value. In the light of the limiting factors of soil fertilizer obtained from the evaluation, the management countermeasures to improve the soil fertility were put forward and could bring important guidance and reference for the maintenance and treatment of the turf soil in Qinhuangdao.